As early as the 4th century AD, Roman Emperor Constantine the Great built the Constantine Cathedral in the northwest corner of Rome to commemorate the martyrdom of Saint Peter, a disciple of Jesus. In the 15th and 16th centuries, the Cathedral of Constantine was renovated into the current St. Peter's Basilica, becoming the venue for the most solemn ceremonies of the Catholic Church. In 756 AD, King Pepin of the Frankish Kingdom presented the city of Rome and its surrounding areas to the Pope (known as the Pepin Offering in church history), which later became the center of church and political life in Western Europe. A Papal State with Rome as its capital was established in Italy, with a direct territory of over 40000 square kilometers.Model making software: 3ds Max 2014 Rendering software: vray3.60.03 for 3dmax2014 If you have any questions, write me: wjjmsn2020@gmail.com .